package drds.server.server.parser;

import drds.server.route.parser.util.ParseUtil;

/**
 * 
 */
public final class ServerParseStart {

	public static final int OTHER = -1;
	public static final int TRANSACTION = 1;

	public static int parse(String stmt, int offset) {
		int i = offset;
		for (; i < stmt.length(); i++) {
			switch (stmt.charAt(i)) {
			case ' ':
				continue;
			case '/':
			case '#':
				i = ParseUtil.comment(stmt, i);
				continue;
			case 'T':
			case 't':
				return transactionCheck(stmt, i);
			default:
				return OTHER;
			}
		}
		return OTHER;
	}

	// START TRANSACTION
	static int transactionCheck(String stmt, int offset) {
		if (stmt.length() > offset + "ransaction".length()) {
			char c1 = stmt.charAt(++offset);
			char c2 = stmt.charAt(++offset);
			char c3 = stmt.charAt(++offset);
			char c4 = stmt.charAt(++offset);
			char c5 = stmt.charAt(++offset);
			char c6 = stmt.charAt(++offset);
			char c7 = stmt.charAt(++offset);
			char c8 = stmt.charAt(++offset);
			char c9 = stmt.charAt(++offset);
			char c10 = stmt.charAt(++offset);
			if ((c1 == 'R' || c1 == 'r') && (c2 == 'A' || c2 == 'a') && (c3 == 'N' || c3 == 'n') && (c4 == 'S' || c4 == 's') && (c5 == 'A' || c5 == 'a') && (c6 == 'C' || c6 == 'c') && (c7 == 'T' || c7 == 't') && (c8 == 'I' || c8 == 'i') && (c9 == 'O' || c9 == 'o') && (c10 == 'N' || c10 == 'n') && (stmt.length() == ++offset || ParseUtil.isEOF(stmt.charAt(offset)))) {
				return TRANSACTION;
			}
		}
		return OTHER;
	}

}